Name: Larkman Nunatak 12059 This is an OFFICIAL meteorite name. Abbreviation: LAR 12059 Observed fall: No Year found: 2012 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 171.3 g
Macroscopic Description - Cari Corrigan and Tim McCoy
The main mass of this meteorite has two distinct sides, one that is highly irregular and knobby, and one that is smooth and rounded. On one edge of the smooth surface is an area of pronounced iridescence. The entire meteorite is a rusty brown color with frequent to abundant rust haloes.
Thin Section Description (,2) - Cari Corrigan and Tim McCoy
The meteorite exhibits a medium octahedral pattern with kamacite lamellae of 1.5-1.8 mm width, with interstitial ribbons of taenite, comb plessite and schreibersite. Rare fusion crust is observed but α2 structure extends ~2 mm into the interior over parts of the section. Inclusions of olivine, pyroxene, plagioclase, troilite and graphite are present. The average composition based on a microprobe traverse of 100 points is 7.6 wt% Ni, 0.12 wt% P. Olivine compositions are Fa5, pyroxenes are bimodal, Fs3Wo45 and Fs6Wo1, and feldspars are An9-17Or4-6. The meteorite is likely a silicate-bearing IAB iron.
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022) SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
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171.3 g
